Springboot using Redis

I. Configuration of POM

    <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-data-redis</artifactId>    </dependency>    <dependency>        <groupId>redis.clients</groupId>        <artifactId>jedis</artifactId>        <version>2.9.0</version>    </dependency>

Ii. creation of redis.properties under the resources

        redis.hostName=127.0.0.1        #端口号          redis.port=6379        #如果有密码          #redis.password=        #客户端超时时间单位是毫秒 默认是2000         redis.timeout=10000                  #最大空闲数          redis.maxIdle=300          #连接池的最大数据库连接数。设为0表示无限制,如果是jedis 2.4以后用redis.maxTotal          #redis.maxActive=600          #控制一个pool可分配多少个jedis实例,用来替换上面的redis.maxActive,如果是jedis 2.4以后用该属性          redis.maxTotal=1000          #最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。          redis.maxWaitMillis=1000          #连接的最小空闲时间 默认1800000毫秒(30分钟)          redis.minEvictableIdleTimeMillis=300000          #每次释放连接的最大数目,默认3          redis.numTestsPerEvictionRun=1024          #逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1          redis.timeBetweenEvictionRunsMillis=30000          #是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个          redis.testOnBorrow=true          #在空闲时检查有效性, 默认false          redis.testWhileIdle=true          

Iii. Preparation of Redisconfig.java

    Package com.example.demo.config;    Import Com.example.demo.util.RedisUtil;    Import Org.slf4j.Logger;    Import Org.slf4j.LoggerFactory;    Import Org.springframework.beans.factory.annotation.Value;    Import Org.springframework.context.annotation.Bean;    Import org.springframework.context.annotation.Configuration;    Import Org.springframework.context.annotation.PropertySource;    Import Org.springframework.data.redis.connection.RedisConnectionFactory;    Import Org.springframework.data.redis.connection.jedis.JedisConnectionFactory;    Import Org.springframework.data.redis.core.RedisTemplate;    Import Org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;    Import Org.springframework.data.redis.serializer.StringRedisSerializer;    Import Redis.clients.jedis.JedisPoolConfig; /** * @author 12084 * @create 2018-08-13 9:58 */@Configuration @PropertySource ("Classpath:redis.propert IES ") public class Redisconfig {public static FINAL Logger Logger = Loggerfactory.getlogger (Redisconfig.class);    @Value ("${redis.hostname}") Private String hostName;    @Value ("${redis.port}") private Integer port;    @Value ("${redis.maxidle}") Private Integer maxidle;    @Value ("${redis.maxtotal}") Private Integer maxtotal;    @Value ("${redis.timeout}") Private Integer timeout;    @Value ("${redis.maxwaitmillis}") Private Integer Maxwaitmillis;    @Value ("${redis.minevictableidletimemillis}") Private Integer Minevictableidletimemillis;    @Value ("${redis.numtestsperevictionrun}") Private Integer Numtestsperevictionrun;    @Value ("${redis.timebetweenevictionrunsmillis}") Private long timebetweenevictionrunsmillis;    @Value ("${redis.testonborrow}") Private Boolean testonborrow;    @Value ("${redis.testwhileidle}") Private Boolean testwhileidle; /** * jedispoolconfig Connection Pool * * @return */@Bean public jedispoolconfig jedispoolconfig () {Jed Ispoolconfig jedispoolconfig = newJedispoolconfig ();        Maximum idle number jedispoolconfig.setmaxidle (Maxidle);        Maximum number of database connections for the connection pool jedispoolconfig.setmaxtotal (maxtotal);        Maximum build connection wait time Jedispoolconfig.setmaxwaitmillis (Maxwaitmillis);        Minimum idle time for eviction connections default 1800000 milliseconds (30 minutes) Jedispoolconfig.setminevictableidletimemillis (Minevictableidletimemillis);        Maximum number of evictions per eviction check if negative: 1/abs (n), default 3 Jedispoolconfig.setnumtestsperevictionrun (Numtestsperevictionrun); Eviction scan interval (milliseconds) if negative, the eviction thread is not run, Default-1 Jedispoolconfig.settimebetweenevictionrunsmillis (TIMEBETWEENEVICTIONRUNSM        Illis);        Whether to verify before removing the connection from the pool, and if the test fails, remove the connection from the pool and try to remove the other jedispoolconfig.settestonborrow (Testonborrow);        Check validity at idle time, default false Jedispoolconfig.settestwhileidle (Testwhileidle);    return jedispoolconfig; } @Bean Public jedisconnectionfactory jedisconnectionfactory (Jedispoolconfig jedispoolconfig) {jedisconnecti Onfactory jedisconnectionfactory = new JedisconnectIonfactory (Jedispoolconfig);        Connection Pool Jedisconnectionfactory.setpoolconfig (jedispoolconfig);        IP address jedisconnectionfactory.sethostname (hostName);        Port number Jedisconnectionfactory.setport (port);        If Redis is set with a password//jedisconnectionfactory.setpassword (password);        The client time-out unit is a millisecond jedisconnectionfactory.settimeout (timeout);    return jedisconnectionfactory; /** * Instantiate redistemplate Object * * @return */@Bean public redistemplate<string, object> func Tiondomainredistemplate (Redisconnectionfactory redisconnectionfactory) {redistemplate<string, Object> RedisT        Emplate = new redistemplate<> ();        Initdomainredistemplate (Redistemplate, redisconnectionfactory);    return redistemplate; }/** * Set data into Redis serialization mode and open transaction * * @param redistemplate * @param factory */private void Init Domainredistemplate (redistemplate<string, object> redistemplate, REdisconnectionfactory Factory) {//If you do not configure serializer, then the default is to use a String when stored, if the user type is stored, it will prompt the error user can ' t cast to string!        Redistemplate.setkeyserializer (New Stringredisserializer ());        Redistemplate.sethashkeyserializer (New Stringredisserializer ());        Redistemplate.sethashvalueserializer (New Genericjackson2jsonredisserializer ());        Redistemplate.setvalueserializer (New Genericjackson2jsonredisserializer ());        Turn on Transaction redistemplate.setenabletransactionsupport (TRUE);    Redistemplate.setconnectionfactory (Factory); }/** * Injection Package redistemplate * * @return redisutil * @throws * @Title: Redisutil */@Bean (name = "Redisutil") public redisutil redisutil (redistemplate<string, object> redistemplate) {redisutil redisUt        Il = new Redisutil ();        Redisutil.setredistemplate (redistemplate);    return redisutil; }    }

Iv. Writing Redisutil Tool classes

    Package com.example.demo.util;    Import Org.slf4j.Logger;    Import Org.slf4j.LoggerFactory;    Import Org.springframework.data.redis.core.RedisTemplate;        Import Org.springframework.util.CollectionUtils;    Import java.util.List;    Import Java.util.Map;    Import Java.util.Set;        Import Java.util.concurrent.TimeUnit; /** * @author 12084 * @create 2018-08-13 10:31 */public class Redisutil {public static final Logger Lo    Gger = Loggerfactory.getlogger (Redisutil.class);    Private redistemplate<string, object> redistemplate; public void Setredistemplate (redistemplate<string, object> redistemplate) {this.redistemplate = RedisTemplat    E }/** * Specify cache Expiration Time * @param key * @param time (seconds) * @return */public boolean expire (String ke Y, long time) {try{if (Time > 0) {redistemplate.expire (key, Time, Timeunit.seconds)            ;        } return true; }catch (Exception e) {logger.error ("Redisutil.expire error:", e);        return false; }}/** * Gets expiration time based on key * * @param key key cannot be null * @return time (seconds) returned 0 is permanent valid */public long get    Expire (String key) {return Redistemplate.getexpire (key, timeunit.seconds);        }/** * Determines if key exists * @param key key * @return True exists false does not exist */public Boolean haskey (String key) {        try{return Redistemplate.haskey (key);            }catch (Exception e) {logger.error ("Redisutil.haskey error:", e);        return false; }}/** * Delete cache * @param key can pass a value or multiple */public void del (String ... key) {if (key = null &amp            ;& key.length > 0) {if (key.length = = 1) {redistemplate.delete (key[0]);            }else {redistemplate.delete (collectionutils.arraytolist (key)); }}}/** * Normal cache gets * * @param key key * @retUrn Value */public Object get (String key) {return key = = null? Null:redisTemplate.opsForValue (). get (key); }/** * Normal cache put * @param key * @param value * @return True Success false failed */public Boolean set (            String key,object value) {try {redistemplate.opsforvalue (). Set (key, value);        return true;            } catch (Exception e) {e.printstacktrace ();        return false; }}/** * Normal cache put and set time * @param key * @param value value * @param time (seconds) to be greater than 0 if duration is less than or equal to 0 will set unlimited Period * @return True Success false failed */public Boolean set (String key,object value,long time) {try {i            F (time>0) {Redistemplate.opsforvalue (). Set (key, value, time, timeunit.seconds);            }else{set (key, value);        } return true;            } catch (Exception e) {e.printstacktrace ();        return false; }    }    }

Five, write test class

  Package com.example.demo.service;    Import Com.example.demo.util.RedisUtil;    Import Org.junit.Test;    Import Org.junit.runner.RunWith;    Import Org.slf4j.Logger;    Import Org.slf4j.LoggerFactory;    Import org.springframework.beans.factory.annotation.Autowired;    Import Org.springframework.boot.test.context.SpringBootTest;    Import Org.springframework.test.context.junit4.SpringRunner; /** * @author 12084 * @create 2018-08-10 10:31 */@RunWith (springrunner.class) @SpringBootTest PU Blic class Redisservicetest {public static final Logger Logger = Loggerfactory.getlogger (redisservicetest.clas            s);                @Autowired private Redisutil Redisutil;    @Test public void T1 () {//Boolean LMJ = Redisutil.set ("LMJ", "520");                Logger.warn ("lmj:{}", LMJ);            String lmj = (string) redisutil.get ("LMJ");        Logger.warn ("lmj:{}", LMJ); }        }

Springboot using Redis